Larry Marshall Archives - International Mining

Kirkland Lake Gold is to install a Chrysos PhotonAssay unit at its Fosterville mine, in Victoria, Australia, as it looks to simplify, speed up and improve its mineral assaying process.

The agreement with Chrysos has seen the unit delivered to Fosterville, with the installation to be fully operational by early October.

Originally developed at Australia’s national science agency, CSIRO, PhotonAssay delivers faster, more accurate gold analysis, Chrysos says, being a quantitative, chemistry-free replacement for fire assay on-site and in the laboratory.

“Hitting samples with high-energy X-rays, the technology causes excitation of atomic nuclei allowing enhanced analysis of gold, silver, and complementary elements in as little as two minutes,” the company says. “Importantly, Chrysos PhotonAssay allows large samples of up to 500 g to be measured and provides a true bulk reading independent of the chemical or physical form of the sample. The process is completely non-destructive, and all samples can be retained for further testing or analysis if required.”

Wess Edgar, Chief Geologist for Kirkland Lake Gold in Australia, said: “We believe the PhotonAssay method has potential benefits for our business that include simple sample preparation, fast turnaround times for high-quality results, and improved outcomes related to health, environment, and the community.

“The sample charge used in the PhotonAssay method is approximately 10-20 times larger than existing fire assay, and thus has potential for a more representative assay result of the entire crushed sample, which is considered important for samples containing high gold grades and/or visible gold, as are often found at Fosterville.”

Fosterville is one of the highest grade gold mines operating across the industry, having produced 619,000 oz in 2019 at an average grade of 39.6 g/t.

PhotonAssay’s latest market success has drawn a positive response from CSIRO’s Chief Executive, Dr Larry Marshall, according to Chrysos.

“It’s very rewarding to have a global leader like Kirkland Lake embrace this new Aussie technology, which sees our research continuing to improve the efficiency and environmental sustainability of the industry around the world,” Dr Marshall said.

Highlighting the benefits of PhotonAssay for miners, Chrysos CEO, Dirk Treasure, stated: “Our PhotonAssay installations provide single-touch operation and improved safety outcomes, whilst also reducing labour requirements and the potential for human error. The technology’s fast turnaround on high sample volumes provides customers with time-critical operational data and drives optimisation through their entire value chain.

“We are seeing increasing interest in Chrysos PhotonAssay from both laboratories and miners. Recent developments across the sector are driving a desire for technological solutions that deliver measurable productivity gains and true competitive advantage. This is an exciting time, not just for us, but for the entire industry.”

On Site Laboratory Services, a company based in Bendigo, will staff and operate the unit at Fosterville on behalf of Kirkland Lake Gold, Chrysos said.

Emesent, a drone autonomy spin-out from Australia’s CSIRO, has raised A$3.5 million ($2.5 million) in venture capital to commercialise its first product, Hovermap.

Main Sequence Ventures, which manages the CSIRO Innovation Fund, led the funding round along with long-time Bechtel mining executive Andy Greig.

Developed by former researchers from CSIRO’s Data61, Emesent’s Hovermap technology automates the collection of valuable data in underground areas too dangerous or difficult for people to survey or navigate, such as stopes or ore passes in mines, the technology arm of Australia’s national science agency said.

“Drones installed with Hovermap can be deployed in GPS-denied environments without a human controller to create 3D maps, and record gas readings, videos and images,” CSIRO said.

Hovermap draws on a decade of research by CSIRO’s Robotics and Autonomous Systems group into drone autonomy and 3D LiDAR-based simultaneous localisation and mapping (3D SLAM) techniques.

Dr Stefan Hrabar, Co-Founder and CEO of Emesent, said: “Hovermap enables the mining industry to safely inspect inaccessible areas of underground mines, while improving the type and quality of data collected to unlock new insights.

“This includes comparing the stope design to the actual post-blast shape to detect over-break and under-break, identification of geotechnical structures and accurate post-blast volume reconciliations.”

The data gathered improves a mine’s productivity and provides a better understanding of conditions underground, all without sending surveyors and miners into potentially hazardous areas, according to Hrabar.

Before being spun out of CSIRO, Hovermap enabled the world’s first fully autonomous beyond line-of-sight drone flight in an underground mine, 600 m below the surface of Western Australia. And the Hovermap system is already being used commercially for a variety of applications by early adopters in Australia, the US, Canada, China and Japan, according to CSIRO.

A new programme targeting the underground mining sector has now been rolled out, providing early access to Emesent’s mining-specific autonomy functions to selected participants.

“The investment will give us the opportunity to build out our team from seven to 25 and make Emesent a global leader in drone autonomy and automated underground data collection and analysis,” Hrabar said.

Queensland-based Emesent has also received support from CSIRO’s ON Accelerator programme. Both Main Sequence Ventures – CSIRO Innovation Fund and ON are supported by the Federal Government’s National Innovation and Science Agenda.

Larry Marshall, CSIRO Chief Executive, said Emesent is an example of a company who has hit the “innovation sweetspot”, combining its deep domain experience in mining with digital expertise.

“This has been harnessed by the environment we have created at CSIRO where deep science combines with innovative ideas and agile minds to create game-changing technologies,” he added.

The field of automated underground drone mapping has been growing recently. Just last month, drone major Terra Drone bought a large stake in Sweden-based startup Inkonova AB, a company focused on aerial robotics for underground mining.

Emesent is partnered with CSIRO’s Data61 to compete in the US Defense Advanced Projects Agency’s new Subterranean Challenge, which aims to develop innovative technologies to rapidly map, navigate and search underground environments.

It is one of seven funded teams competing and the only team selected from outside the US.

Chrysos PhotonAssay unit delivered to Kirkland Lake’s Fosterville gold mine

CSIRO drone autonomy spin-out Emesent finds financial backing